Shell script: Nginx Reverse proxy node status check

LVS can use IPVSAM-LN to view the situation of the RS node, when the RS after the shutdown, when the RS automatically added after the restoration, Nginx can not view, need to install plug-ins or write their own script implementation;

The reverse proxy is configured as follows: (the server removes the preceding space, in order to facilitate later scripts to use SED to do text replacement;)

[[email protected] vhosts]# Cat Upstream01.confupstream Backend {server 192.168.20.10:80 weight=5;server 192.168.20.11:80 weight=5;}    server {Listen 80;    server_name blog.yong.com;        Location/{Proxy_pass http://backend;        Proxy_set_header Host $host;    Proxy_set_header x-forwarded-for $remote _addr; }}

Check the Nginx backend real server script, realize the detection of downtime, restore the service auto-join function;

Script Explanation:

Using the daemon, every 5 seconds to execute a script to determine whether the back-end RS service is normal, found that there is an outage of RS, the SED modified configuration file # comment out the corresponding RS,IP address, and restart the Nginx service, when the Discovery service recovery, remove the # number, and restart the Nginx service, Added to Rs;

[[Email protected] vhosts]# cat check_nginx_rs.sh  #!/bin/bash#written by  [email protected]ip_array= ($ (grep  "192.168.20"  upstream01.conf |awk  ' {print  $2} ' |awk -f ': '   ' {print $1} ') While truedo    for ((i=0;i<${#ip _array[*]};i++))     do         egrep  "^# . *${ip_array[$i]}.* " upstream01.conf &>/dev/null          [ $? -eq 0 ] && continue          status= ' curl -s -w  "%{http_code}"  -o /dev/null ${ip_array[$i]} '          if [ ${status} -ne 200 ]              then               sed -i  "s/server ${ip_array[$i]}/#server  ${ip_array[$i]}/g"  upstream01.conf              /etc/ init.d/nginx reload         fi     Donesleep 5for ((i=0;i<${#ip_array [*]};i++)) do a= ' curl -s -w  "%{http_code}"  -o  /dev/null ${ip_array[$i]} '      if [ ${a} -eq 200  ];then      egrep  "^#.*${ip_array[$i]}.*"  upstream01.conf & >/dev/null      if [ $? -eq 0 ];then            sed -i -r  "s/# (. *${ip_array[$i]}.*)/\1/g"  upstream01.conf           /etc/init.d/nginx  Reload  &nbsP;   fi     fidonedone 

Script execution results such as:

650) this.width=650; "src=" http://s2.51cto.com/wyfs02/M02/76/A0/wKiom1ZX9kezEslWAAAsQwGWDkA131.jpg "title=" Check_ Nginx_rs.jpg "alt=" Wkiom1zx9kezeslwaaasqwgwdka131.jpg "/>

This article is from the "Model Student's Learning blog" blog, please be sure to keep this source http://mofansheng.blog.51cto.com/8792265/1717464

Shell script: Nginx Reverse proxy node status check